Process of coating iron and steel sheets with lead and lead alloys.



R. HAZELTINE.

PROCESS OF COATING IRON AND STEEL SHEETS WITH LEAD AND LEAD ALLOYS.

APPLICATION FILED FEB-9. 1914.

1,161,475. Patented Nov. 23, 1915.

ALLOY LEVEL MW R. HAZELTINE )kMvM WM ATTORNEY (null-u MIA!" minim. n. c.

was a s ria ions PATENT REGINALD HAZELTINE, F IVIIEELING, WEST VIRGINIA, ASSIGNOR T6 WHEELING CORBUGATING GOMIPANY, OF WHEELING, lFJEST VIRGINIA, A CORPORATION OF [VEST VIRGINIA.

PROCESS OE COATING IRON AND STEEL SHEETS WITH, LEAD AND LEAD ALLOYS.

Application filed February 9, 1914.

', high percentages of lead areemployed.

its is well known, the coating of iron and steel sheets or plates with metal is commonly accomplished by directing the same through a pot in which they are first passed through a suitable flux, thence through the coating metal which is in a liquid state, and thence outward through rolls working in palm oil. It has hitherto been impracticable, however, to employ said process in the coating of sheets with lead with alloys containing percentages of lead, due tothe fact that the surfaces of the iron or steel rolls invariahly employed in the pots for eliecting the coating do not become coated with such coatmetal, lead not having an affinity for iron or steel in the presence of pal u oil; and, consequently, a satisfactory lead or leadalloy coating cannot thereby be applied to the sheets.

My invention contemplates the employment of rolls, the outer surfaces of which are composed of a nonferrous metal, as brass, bronze, nickel, copper, or monel metal, which, instead of repelling a tendency to become coated in the presence of palm oil, as

do iron and steel rolls, readily take or acquire a coating of lead or or a high percentage lead alloy, said rolls being submerged or partially submerged in the palm oil of apot containing the lead or alloy in liquid form. The sheets to be coated are passed through, or between, said non-ferrous rolls after having passed through the fluid coating metal in the pot, and, in so passing through, said rolls act to smooth the coating on, and im- 't an even finish to, the surfaces of the sheets, causing the latter to emerge tree from lirt scrutt.

reefer-ring to the accompanying drawing, in which the figure is a longitudinal section of a preferred form of apparatus by means Specification of Letters Patent.

metals.

latented Nov. 3, Serial No. 817,467.

of which my process may he carried out, 1 indicates a coating pot of a common type containing the molten metal 2 with which the'sheets are to he coated. Overlying said metal at .the delivery end of the pot is a quantity of palm oil or other suitable grease or flux 3; Mounted in said delivery end of the pot so as. to be submerged, or partially submerged, in said flux 3 and to also contact with the coating metal 2 is a set of rolls 4 having non-ferrous surfaces. Said rolls 'may be composed wholly of non-ferrous metal, or they may have only their outer, or sheet-engaging, surfaces composed of such metal.

While tin is ordinarily used in connection with lead for producing a suitable metal coating alloy, such, if'fand whenused in the present process, is employed only in e2 tremely small proportions, or in a proportion amount ng to less than five per centum or" the whole, in view of the fact that tin, in

other than relatively small proportions, has

a decided tendency to quickly dissolve or deteriorate brass or bronze or alloys (if-said non-ferrous, as herein used, does not necessarily exclude rolls composed of alloy metals in the composition of which iron enters in non-deleterious proportions, as it is possible that rolls which will take a lead coating in the presence of palm oil may he made of an alloycontaining someiron. By non-ferrous, I therefore mean a metal which possesses the coating characteristics of such'non-ferrous metals as brass, bronze and nickel, and not those of iron and steel. What I claim is i 1. The art of coating iron and steel sheets with alloys wherein lead is the chief constituent, which consists in passin said sheets from the coating bath to and through a suitable overlying flux, and in directing said sheets, during their passage through said flux, between coating-contacting rolls submerged in said flux and composed of a metal which has an aiiinity for said alloy in the presence or" said flux. r

2. The art of coatin iron and steel sheets with lead alloys, whicn consists in passing said sheets through the coating bath and an overlying bath of palm oil, and in subjecting said sheets, during their passage through the i would have it understood'tliatthe term surfaces composed of a non-ferrous metal.

Which has an. aflinity for said alloy in the presence of palm oil.-

3. The art or process of coating iron and steel sheets, which consists in passing said sheets, first, through a high percentage lead v alloy in liquid form, and thence through a suitable flux which overlies said alloy, and in subjectingsaid sheets, during their passage through said flux, to the action of a set of rolls having non-ferrous surfaces submerged in said flux and disposed in contact With said alloy.

4. The art of coating iron and steel sheets With high percentage lead mixtures, which consists in passing said sheets from the coating bath to and between a set of rolls having surfaces composed of a non-ferr 0us' metal,

said rolls being submerged in a flux which overlies said coating bath and having their under surfaces in contact with said bath.

5. The art of coating iron and steel sheets with lead alloys, which consists in passing 25 said sheets from the coating bath of said alloy in liquid form to and through a set of rolls Whose surfaces are composed of an alloy for which lead has an affinity in the presence of palm oil, said rolls being dis- 30 posed with their under surfaces in contact with said alloy and with their meeting point submerged in palm oil overlying said alloy. In testimony whereof, I ailix my signature in presence of two subscribing Witnesses.

Witnesses:

J. B. SCOTT, L. B. VoGLER. 

